package com.tcs.util.net;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Ping {
	
	private Ping(){};
	
	public static boolean ping(String ipAddress) throws Exception {
		int timeOut = 3000; // 超时应该在3钞以上
		boolean status = InetAddress.getByName(ipAddress).isReachable(timeOut); // 当返回值是true时，说明host是可用的，false则不可。
		return status;
	}

	public static void ping02(String ipAddress) throws Exception {
		String line = null;
		try {
			Process pro = Runtime.getRuntime().exec("ping " + ipAddress);
			BufferedReader buf = new BufferedReader(new InputStreamReader(pro.getInputStream()));
			while ((line = buf.readLine()) != null)
				System.out.println(line);
		} catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
	}

	public static boolean ping(String ipAddress, int pingTimes, int timeOut) {
		BufferedReader in = null;
		Runtime r = Runtime.getRuntime(); // 将要执行的ping命令,此命令是windows格式的命令
		String pingCommand = "ping " + ipAddress + " -n " + pingTimes + " -w " + timeOut;
		try { // 执行命令并获取输出
			System.out.println(pingCommand);
			Process p = r.exec(pingCommand);
			if (p == null) {
				return false;
			}
			in = new BufferedReader(new InputStreamReader(p.getInputStream())); // 逐行检查输出,计算类似出现=23ms
																				// TTL=62字样的次数
			int connectedCount = 0;
			String line = null;
			while ((line = in.readLine()) != null) {
				connectedCount += getCheckResult(line);
			} // 如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真
			return connectedCount == pingTimes;
		} catch (Exception ex) {
			ex.printStackTrace(); // 出现异常则返回假
			return false;
		} finally {
			try {
				in.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * ping linux 命令
	 * @param address : IP地址
	 * @param pingNum : 次数
	 * @return
	 * @throws IOException 
	 */
	public static boolean ping(String address,int pingNum) throws IOException {
		boolean result = false;
		BufferedReader in = null;
		Runtime r = Runtime.getRuntime(); // 将要执行的ping命令,此命令是linux格式的命令
		String command = "ping " + address + " -c " + pingNum;
		Process process = r.exec(command);
		if (process == null) {
			return result;
		}
		in = new BufferedReader(new InputStreamReader(process.getInputStream())); // 逐行检查输出,计算类似出现=23ms
		String readLine = null;
		while ((readLine = in.readLine()) != null) {
			System.out.println(readLine);
			if (readLine.indexOf("Destination") > 0) {
				return result;
			}
		}
		result = true;
		return result;
	}

	// 若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.
	private static int getCheckResult(String line) { // System.out.println("控制台输出的结果为:"+line);
		Pattern pattern = Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)", Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(line);
		while (matcher.find()) {
			return 1;
		}
		return 0;
	}

//	public static void main(String[] args) throws Exception {
//		String [] array = new String[]{"192.168.1.113" , "192.168.1.111" , "192.168.1.114"};
//		System.out.println(ping(ipAddress));
//		ping02(ipAddress);
//		for (String ip : array ) {
//			System.out.println(ping(ip, 10));
//		}
//		try {
//			String value = null;
//			value.indexOf("1");
//		} catch (Exception e) {
//			System.out.println(e.getCause().getMessage());
//		}
//	}

}
